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摘要
The thermal decomposition of latex foam was investigated under nonisothermal conditions. Pieces of commercial mattress samples were subjected to thermogravimetric analysis (TG) over a heating range from 5 degrees C min(-1) to 20 degrees C min(-1). The morphology of the latex foam before and after combustion was observed by scanning electron microscopy (SEM), and the primary chemical composition was investigated via infrared spectroscopy (FT-IR). The kinetic mechanism and relevant parameters were calculated. Results indicate that the decomposition of latex foam in the three major degradation phases is controlled by third-order reaction (F3) and by Zhuravlev's diffusion equation (D5). The mean. values of each phase as calculated according to a single heating rate nonisothermal method are equal to 41.91 +/- 0.06 kJmol(-1), 86.32 +/- 1.04 kJ mol(-1), and 19.53 +/- 0.11 kJmol(-1), respectively. Correspondingly, the preexponential factors of each phase are equal to 300.39 s(-1), 2355.65s(-1), and 27.90s(-1), respectively. The mean activation energy.. and preexponential factor A of latex foam estimated according to multiple heating rates and a nonisothermal method are 92.82 kJmol(-1) and 1.12 x 10(-3) s(-1), respectively.
- 出版日期2016
- 单位中国计量大学
